diff --git a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha256.h b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha256.h
index 307f0ec123..05040ded86 100644
--- a/tf-psa-crypto/drivers/builtin/include/mbedtls/sha256.h
+++ b/tf-psa-crypto/drivers/builtin/include/mbedtls/sha256.h
@@ -119,20 +119,6 @@ int mbedtls_sha256_update(mbedtls_sha256_context *ctx,
 int mbedtls_sha256_finish(mbedtls_sha256_context *ctx,
                           unsigned char *output);
 
-/**
- * \brief          This function processes a single data block within
- *                 the ongoing SHA-256 computation. This function is for
- *                 internal use only.
- *
- * \param ctx      The SHA-256 context. This must be initialized.
- * \param data     The buffer holding one block of data. This must
- *                 be a readable buffer of length \c 64 Bytes.
- *
- * \return         \c 0 on success.
- * \return         A negative error code on failure.
- */
-int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
-                                    const unsigned char data[64]);
 /**
  * \brief          This function calculates the SHA-224 or SHA-256
  *                 checksum of a buffer.
diff --git a/tf-psa-crypto/drivers/builtin/src/sha256.c b/tf-psa-crypto/drivers/builtin/src/sha256.c
index 1bfb701bcf..339fa84422 100644
--- a/tf-psa-crypto/drivers/builtin/src/sha256.c
+++ b/tf-psa-crypto/drivers/builtin/src/sha256.c
@@ -414,13 +414,6 @@ static size_t mbedtls_internal_sha256_process_many_a64_crypto(
     return processed;
 }
 
-#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
-/*
- * This function is for internal use only if we are building both C and Armv8-A
- * versions, otherwise it is renamed to be the public mbedtls_internal_sha256_process()
- */
-static
-#endif
 int mbedtls_internal_sha256_process_a64_crypto(mbedtls_sha256_context *ctx,
                                                const unsigned char data[SHA256_BLOCK_SIZE])
 {
@@ -474,13 +467,6 @@ int mbedtls_internal_sha256_process_a64_crypto(mbedtls_sha256_context *ctx,
         (d) += local.temp1; (h) = local.temp1 + local.temp2;        \
     } while (0)
 
-#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
-/*
- * This function is for internal use only if we are building both C and Armv8
- * versions, otherwise it is renamed to be the public mbedtls_internal_sha256_process()
- */
-static
-#endif
 int mbedtls_internal_sha256_process_c(mbedtls_sha256_context *ctx,
                                       const unsigned char data[SHA256_BLOCK_SIZE])
 {
@@ -617,7 +603,7 @@ static size_t mbedtls_internal_sha256_process_many(mbedtls_sha256_context *ctx,
     }
 }
 
-int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
+static int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
                                     const unsigned char data[SHA256_BLOCK_SIZE])
 {
     if (mbedtls_a64_crypto_sha256_has_support()) {